Scheduling with time clock controls turns lights on and off, sets lighting levels for different times of day and changes the lighting profile for after-hours mode. More sophisticated systems also respond to signals sent from external control devices such as sensors or switches.
Paraffin wax is a solid form of paraffin, a specific type of alkane hydrocarbon. It is used in a wide range of everyday applications, most notably in common candles. This wax also sees a great deal of use in industrial applications, and it is present in everything from the Lunar Rover to drywall.araffin wax is a solid form of paraffin, a specific type of alkane hydrocarbon. It is used in a wide range of everyday applications, most notably in common candles. This wax also sees a great deal of use in industrial applications, and it is present in everything from the Lunar Rover to drywall.
MacGuffin (plural MacGuffins) (narratology) A plot element or other device used to catch the audience's attention and maintain suspense, but whose exact nature has fairly little influence over the storyline. quotations â¼ 2000, Steven Spielberg, Lester D. Friedman, Brent Notbohm, Steven Spielberg: Interviews  ...